How to use coupons to buy B1G1 FREE

I just found the perfect examples to explain how to use coupons when buying one and getting one FREE.
Most stores (Publix, Target, Walgreens, etc.) consider each item of this offer a single purchase, meaning you can use one coupon per each, Sweet!

from my today's quick trip to Publix:

B1G1 FREE Nathan's beef franks $5.49 - 2/$1.00 OFF MC = $3.49 or $1.74 per pack (not bad, huh?)
got coupons from HERE

In this case, I had $1.00 OFF when buying 2 pasta boxes so,
B1G1 FREE Mueller's pasta $1.59 - $1.00 OFF WYB2 MC = $0.59 or $0.30 per box (love it!)
Visit Mueller's website HERE and grab some coupons.

Total retail price: $14.16
B1G1 FREE total price: $7.08
I paid $4.08